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RC522 Datasheet(PDF) 66 Page - NXP Semiconductors

Part # RC522
Description  Contactless Reader IC
PDF  109 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

RC522 Datasheet(HTML) 66 Page - NXP Semiconductors

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© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 3.2 — 22 May 2007
66 of 109
NXP Semiconductors
MFRC522
Contactless Reader IC
The bit HiAlert is set to logic 1 if maximum WaterLevel bytes (as set in register
WaterLevelReg) or less can be stored in the FIFO-buffer. It is generated according to the
following equation:
The bit LoAlert is set to logic 1 if WaterLevel bytes (as set in register WaterLevelReg) or
less are actually stored in the FIFO-buffer. It is generated according to the following
equation:
HiAlert
64
FIFOLength
)
–
(
WaterLevel
≤
=
LoAlert
FIFOLength
WaterLevel
≤
=



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